[Dialect] Migrate away from PointerUnion::{is,get} (NFC)

mlir/include/mlir/Dialect/Async/IR/AsyncOps.td

@@ -256,7 +256,7 @@ def Async_CallOp : Async_Op<"call",
 
     /// Set the callee for this operation.
     void setCalleeFromCallable(CallInterfaceCallable callee) {
-      (*this)->setAttr("callee", callee.get<SymbolRefAttr>());
+      (*this)->setAttr("callee", cast<SymbolRefAttr>(callee));
     }
   }];
 

mlir/include/mlir/Dialect/EmitC/IR/EmitC.td

@@ -580,7 +580,7 @@ def EmitC_CallOp : EmitC_Op<"call",
 
     /// Set the callee for this operation.
     void setCalleeFromCallable(CallInterfaceCallable callee) {
-      (*this)->setAttr("callee", callee.get<SymbolRefAttr>());
+      (*this)->setAttr("callee", cast<SymbolRefAttr>(callee));
     }
   }];
 

mlir/include/mlir/Dialect/Func/IR/FuncOps.td

@@ -97,7 +97,7 @@ def CallOp : Func_Op<"call",
 
     /// Set the callee for this operation.
     void setCalleeFromCallable(CallInterfaceCallable callee) {
-      (*this)->setAttr("callee", callee.get<SymbolRefAttr>());
+      (*this)->setAttr("callee", cast<SymbolRefAttr>(callee));
     }
   }];
 
@@ -168,7 +168,7 @@ def CallIndirectOp : Func_Op<"call_indirect", [
 
     /// Set the callee for this operation.
     void setCalleeFromCallable(CallInterfaceCallable callee) {
-      setOperand(0, callee.get<Value>());
+      setOperand(0, cast<Value>(callee));
     }
   }];
 

mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td

@@ -339,7 +339,7 @@ def LLVM_GEPOp : LLVM_Op<"getelementptr", [Pure,
         indices.push_back(value);
       else
         indices.push_back(
-            builder.getInt32(valueOrAttr.get<IntegerAttr>().getInt()));
+            builder.getInt32(cast<IntegerAttr>(valueOrAttr).getInt()));
     }
     Type baseElementType = op.getElemType();
     llvm::Type *elementType = moduleTranslation.convertType(baseElementType);

mlir/include/mlir/Dialect/Transform/IR/TransformOps.td

@@ -899,7 +899,7 @@ def IncludeOp : TransformDialectOp<"include",
     }
 
     void setCalleeFromCallable(::mlir::CallInterfaceCallable callee) {
-      setTargetAttr(callee.get<SymbolRefAttr>());
+      setTargetAttr(cast<SymbolRefAttr>(callee));
     }
 
     ::mlir::Operation::operand_range getArgOperands() {

mlir/lib/Dialect/Affine/IR/AffineOps.cpp

@@ -5069,7 +5069,7 @@ static OpFoldResult computeProduct(Location loc, OpBuilder &builder,
     if (maybeConst) {
       result = result * builder.getAffineConstantExpr(*maybeConst);
     } else {
-      dynamicPart.push_back(term.get<Value>());
+      dynamicPart.push_back(cast<Value>(term));
       result = result * builder.getAffineSymbolExpr(nDynamic++);
     }
   }

mlir/test/lib/Dialect/Affine/TestReifyValueBounds.cpp

@@ -150,7 +150,7 @@ static LogicalResult testReifyValueBounds(FunctionOpInterface funcOp,
       return WalkResult::skip();
     }
     Value constOp = rewriter.create<arith::ConstantIndexOp>(
-        op->getLoc(), cast<IntegerAttr>(reified->get<Attribute>()).getInt());
+        op->getLoc(), cast<IntegerAttr>(cast<Attribute>(*reified)).getInt());
     rewriter.replaceOp(op, constOp);
     return WalkResult::skip();
   });

mlir/test/lib/Dialect/Test/TestOpDefs.cpp

@@ -1098,7 +1098,7 @@ CallInterfaceCallable TestCallAndStoreOp::getCallableForCallee() {
 }
 
 void TestCallAndStoreOp::setCalleeFromCallable(CallInterfaceCallable callee) {
-  setCalleeAttr(callee.get<SymbolRefAttr>());
+  setCalleeAttr(cast<SymbolRefAttr>(callee));
 }
 
 Operation::operand_range TestCallAndStoreOp::getArgOperands() {
@@ -1117,7 +1117,7 @@ CallInterfaceCallable TestCallOnDeviceOp::getCallableForCallee() {
 }
 
 void TestCallOnDeviceOp::setCalleeFromCallable(CallInterfaceCallable callee) {
-  setCalleeAttr(callee.get<SymbolRefAttr>());
+  setCalleeAttr(cast<SymbolRefAttr>(callee));
 }
 
 Operation::operand_range TestCallOnDeviceOp::getArgOperands() {

mlir/test/lib/Dialect/Test/TestOps.td

@@ -566,7 +566,7 @@ def ConversionCallOp : TEST_Op<"conversion_call_op",
     }
 
     void $cppClass::setCalleeFromCallable(::mlir::CallInterfaceCallable callee) {
-      (*this)->setAttr("callee", callee.get<SymbolRefAttr>());
+      (*this)->setAttr("callee", cast<SymbolRefAttr>(callee));
     }
   }];
 }

mlir/test/lib/Dialect/Test/TestTypes.cpp

@@ -295,8 +295,9 @@ TestTypeWithLayoutType::verifyEntries(DataLayoutEntryListRef params,
   for (DataLayoutEntryInterface entry : params) {
     // This is for testing purposes only, so assert well-formedness.
     assert(entry.isTypeEntry() && "unexpected identifier entry");
-    assert(llvm::isa<TestTypeWithLayoutType>(entry.getKey().get<Type>()) &&
-           "wrong type passed in");
+    assert(
+        llvm::isa<TestTypeWithLayoutType>(llvm::cast<Type>(entry.getKey())) &&
+        "wrong type passed in");
     auto array = llvm::dyn_cast<ArrayAttr>(entry.getValue());
     assert(array && array.getValue().size() == 2 &&
            "expected array of two elements");